Recovery of Bad Debt on Physical Coal	12 Months Ended
Sep. 30, 2021
Recovery of Bad Debt on Physical Coal [Abstract]
Recovery of Bad Debt on Physical Coal	Recovery of Bad Debt on Physical Coal During the year ended September 30, 2019, the Company reached settlements with clients, paying $8.4 million related to demurrage, dead freight, and other penalty charges regarding coal supplied during the year ended September 30, 2017. The settlement amounts paid were less than the accrued liabilities for the transactions recorded during the years ended September 30, 2018 and 2017, and accordingly the Company recorded a recovery on the bad debt on physical coal of $2.4 million. Additionally, during the year ended September 30, 2019, the Company received $10.0 million through an insurance policy claim related to the physical coal bad debt, and recorded the insurance proceeds as an additional recovery. The Company presented the bad debt on physical coal and subsequent recoveries separately as a component of income before tax in the Consolidated Income Statements. During the year ended September 30, 2020, the Company charged off $35.6 million of receivables against the allowance for doubtful accounts related to the physical coal business as the Company had exhausted all economically sensible means of recovery.

Recovery of Bad Debt on Physical Coal

12 Months Ended

Sep. 30, 2021

Recovery of Bad Debt on Physical Coal [Abstract]

Recovery of Bad Debt on Physical Coal During the year ended September 30, 2019, the Company reached settlements with clients, paying $8.4 million related to demurrage, dead freight, and other penalty charges regarding coal supplied during the year ended September 30, 2017. The settlement amounts paid were less than the accrued liabilities for the transactions recorded during the years ended September 30, 2018 and 2017, and accordingly the Company recorded a recovery on the bad debt on physical coal of $2.4 million. Additionally, during the year ended September 30, 2019, the Company received $10.0 million through an insurance policy claim related to the physical coal bad debt, and recorded the insurance proceeds as an additional recovery. The Company presented the bad debt on physical coal and subsequent recoveries separately as a component of income before tax in the Consolidated Income Statements. During the year ended September 30, 2020, the Company charged off $35.6 million of receivables against the allowance for doubtful accounts related to the physical coal business as the Company had exhausted all economically sensible means of recovery.